!3 ''Not Enough Points'' * ''Bill tops up point balance to 10.00'' |''begin admin transaction''|Bill| |''topup''|10.00|''points for client''|Joanna| |''complete transaction''| |'''check'''|point balance for client|Joanna|10.00| !3 ''Try to pay with points, but fails because not enough points avaiable'' |''begin transaction for client''| Joanna |''staff''| Bill| |''rent''|2||coffee dispenser|''for''|3 days| |''rent''|1||hot water dispenser|''for''|3 days| |'''reject'''|''pay with points $''|73.20| |''pay with cash $''|73.20| |''complete transaction''| |'''check'''|point balance for client|Joanna|10.00|